David marshall



DAVID MARSHALL, or NoRTnvI-LLE, MICHIGAN.

Letters Patent No. 106,379, dated .August 16, 1870.

IMPROVEMENT IN CARRIAGE-JACK.

The Schedule referred..A to in these Letters Patent and making part of the same To all whom it 'may concern:

Be it known that I, DAVID MARSHALL, of Northville, in county of lVayne and State of Michigan, have invented a new and useful Improvement in GarriagelJacks and Ido hereby declare that the follow'- ing is a full, clear, and exact descriptionl ot' the construction and operation of the same, reference heilig had to the annexed drawing making a part of this specification, in which- Figure 1 is a side elevation.

Figure 2, a vertical section.

Theletters of reference refer to the same parts in each figure. v

The nature of my invention consists in making a carriage-jack that may be readily applied to either axle. ofa carriage, and be adjusted to the height of the axle by the vuse of the lever, and with the salue lever raise the carriage, and by the peculiar shape of the upper end of the lever it will raise the axle when the handle ofthe lever is thrust downward, and sustain it until the level' is raised again.

To enable others skilledin the art to make and use my invention, I will describe its mode of constructionand operation.

A is the base that supports the other part-s by having,r tenons of the standard B inserted into it; the size should be such that it will prevent the carriage moving while a wheel is being taken offbrput on.

B is a standard; it is made with. one or -more tenons at the lower end that are inserted into the base A, to keep itin a vertical position when' being used; its length must be such that it will n ot quite reach up to the axle. Aplace is made in the middleV and upper end that will receive the sliding prop C, and the inner surfaces are provided with tongues or grooves, that must be made to correspond with the tongues or grooves ofthe prop C. These tongues and grooves keep the prop withiu the standard and allow the prop to be raised in line with the standard.

C is a prop. It is made to it within the place that is made in the standard it is provided with tongues or grooves that fit the corresponding parts in the standard; it must have a long mortise made through it foninserting the upper end of the lever D, and a srnall wheel at the upper end, as represented in tig. 2, and the wheel ispivoted so as to be turned freelyby the action of the lever.

D is a lever, made in the shape represented in the figures; it is provided wit-h a pin or bolt that passes through it, which serves as a fulcrnm for the lever. This pin may be placed on anyfof the 4catches of the vpart E that best corresponds withthe height of the axle; then, by thrusting the' handle end of the lever down, the prop'is raised, and with it the axle, and, by the peculiar shape of the upper end of the lever, the prop is held as long as desired; then, by lifting the lower end of the lever, the prop and axle may be lowered at will.

, E is one of aV pair of fulcrum-plates; oneis placed on each of the upper ends ofthe standard and securely fastened; they are provided with a series of catches for the pin of the'lever to rest upon. This series of catches is required to allow the jack to be adjustedto axles of various heights. 'llhese plates are provided with a band, as shown in figl; its use is to prevent the lever being liberated from 'theother parts when not in use, and aid in raising orlowering the lever; also to afford a goed means for hanging up the jack.

Having thus fully described my. invention,

What I claim as new, and desire to secure by Letters Patent, is-

Iu the construction of carriage-jacks, the arrangement of' the standard B, prop G, with the wheel F, lever D, and fulcrum-plates E, when all are made. and combined substantially as and for 'the purpose herein set forth.

Witnesses: DAVID MARSHALL.

M. A. OLDS, l). OLNEY. 

